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Date:   Mon, 26 Sep 2022 09:56:49 +0200
From:   Olaf Hering <olaf@aepfle.de>
To:     "Michael Kelley (LINUX)" <mikelley@microsoft.com>
Cc:     Li kunyu <kunyu@nfschina.com>, KY Srinivasan <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        "wei.liu@kernel.org" <wei.liu@kernel.org>,
        Dexuan Cui <decui@microsoft.com>,
        "catalin.marinas@arm.com" <catalin.marinas@arm.com>,
        "will@kernel.org" <will@kernel.org>,
        "tglx@linutronix.de" <tglx@linutronix.de>,
        "mingo@redhat.com" <mingo@redhat.com>,
        "bp@alien8.de" <bp@alien8.de>,
        "dave.hansen@linux.intel.com" <dave.hansen@linux.intel.com>,
        "hpa@zytor.com" <hpa@zytor.com>, "arnd@arndb.de" <arnd@arndb.de>,
        "x86@kernel.org" <x86@kernel.org>,
        "linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Subject: Re: [PATCH v3] hyperv: simplify and rename generate_guest_id
Message-ID: <20220926095649.1f963340.olaf@aepfle.de>
In-Reply-To: <BYAPR21MB1688890F578A59F69DEB55C1D7509@BYAPR21MB1688.namprd21.prod.outlook.com>
References: <20220923114259.2945-1-kunyu@nfschina.com>
        <20220923230917.1506b24c.olaf@aepfle.de>
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Sat, 24 Sep 2022 05:31:34 +0000 "Michael Kelley (LINUX)" <mikelley@microsof=
t.com>:

> From: Olaf Hering <olaf@aepfle.de> Sent: Friday, September 23, 2022 2:09 =
PM

> > A very long time ago I removed most usage of version.h AFAIR,
> Could you elaborate?

It is the cost of 'make LOCALVERSION=3Dx' vs. 'make LOCALVERSION=3Dy'.

Too many drivers will be recompiled for no good reason as of today.
I claim no consumer below drivers/ and sound/ has a valid usecase for versi=
on.h.
But, someone else has to take the energy and argue them out of the tree.

With the proposed change every consumer of asm-generic/mshyperv.h will be d=
irty,
see 'touch include/asm-generic/mshyperv.h' for the impact. Therefore I think
only the two existing c files should include this header, in case the provi=
ded
information has a true value for the consumer.


Olaf

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